CN218494239U - Fluid stop valve and liquid injection equipment - Google Patents

Abstract

The utility model relates to a fluid stop valve and notes liquid equipment. The fluid stop valve comprises a valve body with a liquid inlet channel and a valve core channel, a valve core movably and hermetically arranged in the valve body, a liquid injection piece connected and communicated with the valve core and a reset piece used for driving the valve core to reset from a working state to a cut-off state. The inner wall of the liquid inlet channel is provided with a first flow guide surface which is in a contraction shape along a first direction. Part of the valve core is positioned in the liquid inlet channel, and the rest of the valve core is arranged in the valve core channel in a penetrating way. The valve core is provided with a liquid inlet and a liquid outlet. The outer wall of the valve core is provided with a second flow guide surface which is in a contraction shape along the first direction. The reset piece is arranged in the valve core channel. When the valve core is in a working state, the second flow guide surface is separated from the first flow guide surface, and the liquid inlet is positioned in the liquid inlet channel. When the valve core is in a cut-off state, the second flow guide surface is abutted against the first flow guide surface, and the liquid inlet is positioned in the valve core channel. The fluid stop valve has the advantages of low cost, simple structure and low possibility of liquid accumulation.

Description

Fluid stop valve and liquid injection equipment

Technical Field

The utility model relates to a annotate technical field of liquid equipment fluid stop valve, especially relate to fluid stop valve and annotate liquid equipment.

Background

In order to fill the battery, a filling device is typically used to introduce a fluid (e.g., electrolyte) from a reservoir into the battery. Due to the long length of the pipeline during transportation, vibration, sealing and other factors, liquid drops or air bubbles can flow back into the pipeline to pollute the battery or cause inaccurate dosage. Therefore, a fluid stop valve is usually added to the filling equipment.

Conventional fluid shutoff valves typically include a valve body and a valve spool. The valve body is internally provided with a valve core which can move relative to the valve body to change the relative position of the valve core and the valve body, thereby realizing the cut-off of the fluid passage or the fluid. The valve core is pushed to move relative to the valve body by pneumatic or electric pressure.

However, in practical use, the fluid cut-off valve must rely on an electric circuit or an air passage to achieve fluid passage or fluid cut-off, which results in high cost and complex structure of the fluid cut-off valve.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a fluid stop valve and a liquid injection device, which can solve the problem that a fluid stop valve can only achieve fluid passage or fluid stop through an electric circuit or an air passage.

A fluid shut-off valve, comprising:

the valve body is provided with a liquid inlet channel and a valve core channel which are arranged along a first direction and communicated with each other, and a first flow guide surface which is in a contraction shape along the first direction is arranged on the inner wall of the liquid inlet channel;

the valve core, some said valve cores locate in said liquid inlet channel, the remaining said valve core is through-set in said valve core channel, said valve core and said valve core channel are sealed and set up, said valve core can move along the first direction and second direction relative to said valve block, the said second direction is the opposite direction of the said first direction; the valve core is provided with a liquid inlet and a liquid outlet; the outer wall of the valve core is provided with a second flow guide surface which is in a contraction shape along the first direction;

the liquid injection piece is connected with the valve core and is provided with a liquid outlet channel which is communicated with the liquid outlet;

the reset piece is arranged in the valve core channel and is used for driving the valve core to reset from a working state to a cut-off state;

when the valve core is in a working state, the second flow guide surface is separated from the first flow guide surface, and the liquid inlet is positioned in the liquid inlet channel;

when the valve core is in a cut-off state, the second flow guide surface is abutted against the first flow guide surface, and the liquid inlet is positioned in the valve core channel.

In one embodiment, the liquid injection valve further comprises a connecting piece, the connecting piece is provided with a flow channel and is connected with the valve core and the liquid injection piece, and the liquid outlet is communicated with the liquid outlet channel through the flow channel.

In one embodiment, the reset piece is sleeved on the outer wall of the valve core and has elasticity, and in the first direction, one end of the reset piece is abutted against the connecting piece, and the other end of the reset piece is abutted against the inner wall of the valve core channel.

In one embodiment, the valve core channel comprises a first channel, a second channel and a third channel which are sequentially communicated along a first direction, the first channel is used for accommodating the part of the valve core with the liquid inlet, the second channel is used for accommodating the part of the valve core sleeved with the resetting piece, and the third channel is used for accommodating the part of the valve core provided with the connecting piece; the inner wall of the second channel is provided with a connecting surface which is used for being abutted against the resetting piece; the cross-sectional areas of the first channel, the second channel and the third channel are sequentially increased.

In one embodiment, the inner wall of the valve core channel is provided with a first abutting surface, the connecting piece is provided with a second abutting surface, and when the second abutting surface abuts against the first abutting surface, the resetting piece has the maximum restoring force.

In one embodiment, the flow channel includes a first flow channel and a second flow channel which are sequentially communicated, the first flow channel is communicated with the liquid outlet and is in a contraction shape in a direction far away from the liquid outlet, the second flow channel is communicated with the liquid outlet channel, the valve core is provided with a liquid passing channel communicated with the liquid inlet and the liquid outlet, and the cross-sectional area of the second flow channel is smaller than that of the liquid passing channel.

In one embodiment, the liquid outlet is expanded along a first direction;

and/or, the quantity of inlet is a plurality of, and is a plurality of the inlet is followed the circumference interval setting of case, say one the inlet all communicates.

In one embodiment, a first limiting surface is arranged on the inner wall of the liquid inlet channel, a second limiting surface is arranged at the end part of the valve core, and when the valve core is in a working state, the first limiting surface is abutted against the second limiting surface.

In one embodiment, the method is characterized in that: the fluid stop valve further comprises a first sealing element, the second flow guide surface or the first flow guide surface is provided with a first accommodating groove, the first sealing element is arranged in the first accommodating groove, and the first sealing element is used for sealing the first flow guide surface and the second flow guide surface;

and/or the fluid stop valve further comprises a second sealing element, a second accommodating groove is formed in the inner wall of the valve core or the valve core channel, the second sealing element is arranged in the second accommodating groove, and the second sealing element is used for sealing the valve core and the inner wall of the valve core channel.

A priming device comprises the fluid stop valve. When adopting priming device to annotate the liquid, annotate liquid spare with treat annotate liquid spare butt to drive the relative valve body of case and remove along the second direction, first water conservancy diversion face and the separation of second water conservancy diversion face, the inlet exposes to the inlet channel in. The restoring member is in a state of accumulating restoring force. After liquid enters the liquid inlet from the liquid inlet channel, the liquid moves to the liquid outlet along the valve core and flows to the liquid outlet channel from the liquid outlet, and the liquid enters the liquid piece to be injected along the liquid outlet channel so as to complete liquid injection.

After annotating the liquid completion, annotate liquid spare with wait to annotate liquid spare separation, reset the piece and drive the case along first direction motion for the complete holding of inlet is in the case passageway, and first water conservancy diversion face offsets with the second water conservancy diversion face, and inlet channel are the non-connected state this moment, and liquid can't get into the inlet, realizes that liquid ends. Because first water conservancy diversion face and second water conservancy diversion face are the shrink form, consequently when case position change so that it changes between operating condition and final condition, the difficult hydrops of first water conservancy diversion face and second water conservancy diversion face department can realize more accurate notes liquid.

In the process, the reset piece can drive the valve core to be in a stop state, and other power pieces such as a circuit and an air circuit power piece do not need to be additionally arranged to reset the valve core, so that the opening and closing of the fluid stop valve are controlled at low cost.

Drawings

Fig. 1 is a schematic structural diagram of a fluid stop valve according to the present invention (the valve element is in a stop state).

Fig. 2 is a schematic structural diagram of a fluid stop valve according to the present invention (the valve element is in a working state).

Fig. 3 is a schematic diagram illustrating a liquid flowing state of the fluid stop valve in an operating state according to the present invention.

Reference numerals are as follows:

100. a valve body; 101. opening a liquid inlet; 102. a first flow guide surface; 103. a connecting surface; 104. a first abutting surface; 105. a first limit surface; 110. a liquid inlet channel; 120. a spool passage; 121. a first channel; 122. a second channel; 123. a third channel; 200. a valve core; 201. a liquid inlet; 202. a liquid outlet; 203. a liquid passing channel; 210. entering a section; 211. a second flow guide surface; 212. a first accommodating groove; 213. a second limiting surface; 220. a middle section; 221. a second accommodating groove; 230. a connecting section; 300. a connecting member; 301. a flow channel; 3011. a first flow passage; 3012. a second flow passage; 310. a first connection portion; 320. a second connecting portion; 321. resetting the sealing groove; 322. a second abutting surface; 400. injecting liquid; 401. a liquid outlet channel; 402. a liquid injection port; 403. a connecting structure; 500. a reset member; 600. a first seal member; 700. a second seal member; 800. and resetting the sealing member.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

Referring to fig. 1, an embodiment of the present invention provides a fluid stop valve, which includes a valve body 100, a valve core 200, a liquid injection member 400, and a reset member 500.

For convenience of description, an axial direction of the valve body 100 is defined, and a direction along the valve body 100 to the injection member 400 is a first direction, i.e., a Z direction shown in fig. 1 to 3. The opposite direction to the first direction is defined as a second direction. I.e. in the opposite direction to the Z-direction shown in fig. 1-3.

The valve body 100 has a fluid inlet passage 110 and a valve body passage 120, which are arranged in a first direction and communicate with each other. The inner wall of the liquid inlet channel 110 is provided with a first flow guiding surface 102 which is in a contraction shape along a first direction. The aforementioned convergent shape means that the cross-sectional area of the portion of the spool passage 120 defined by the first guide surface 102 decreases along the first direction. The valve spool 200 is movable in a first direction and a second direction with respect to the valve body 100. A part of the valve body 200 is located in the inlet passage 110, and the remaining valve body 200 is disposed through the valve body passage 120. The valve cartridge 200 is sealingly disposed with the cartridge passage 120. The valve core 200 has an inlet 201 and an outlet 202. The outer wall of the valve body 200 is provided with a second guide surface 211 which is contracted along the first direction. The second flow guide surfaces 211 may abut the first flow guide surfaces 102. The liquid injection piece 400 is connected with the valve core 200, the liquid injection piece 400 is provided with a liquid outlet channel 401, and the liquid outlet channel 401 is communicated with the liquid outlet 202, so that liquid is injected into the piece 400 to be injected through the liquid outlet channel 401 after being discharged from the liquid outlet 202 of the valve core 200, and the piece 400 to be injected can be a battery. The reset member 500 is disposed within the spool passage 120. The reset member 500 can drive the spool 200 to reset from the operating state to the cutoff state.

As shown in fig. 2 and 3, when the valve cartridge 200 is in the working state, the second guiding surface 211 is separated from the first guiding surface 102, and the liquid inlet 201 is located in the liquid inlet channel 110. As shown in fig. 1, when the valve core 200 is in the off state, the second flow guiding surface 211 abuts against the first flow guiding surface 102, and the liquid inlet 201 is located in the valve core passage 120.

When the fluid stop valve injects fluid, the fluid injection piece 400 abuts against the to-be-injected piece 400 to drive the valve core 200 to move along the second direction relative to the valve body 100, so that the fluid inlet 201 is exposed into the fluid inlet channel 110. After entering the liquid inlet 201 from the liquid inlet channel 110, the liquid moves to the liquid outlet 202 along the valve core 200, flows to the liquid outlet channel 401 from the liquid outlet 202, and enters the liquid to be injected member 400 from the liquid outlet channel 401, so as to complete liquid injection. In the above process, the restoring member 500 assumes a state of accumulating restoring force. After the liquid injection is completed, the liquid injection piece 400 is separated from the to-be-injected piece 400, the reset piece 500 drives the valve core 200 to move along the first direction, so that the liquid inlet 201 is completely accommodated in the valve core channel 120, and at the moment, the liquid inlet 201 and the liquid inlet channel 110 are in a non-communicated state, so that the liquid cannot reach the liquid inlet 201, and the liquid stop is realized. Because the reset piece 500 can drive the valve core 200 to be in a stop state, in the process, other power pieces such as a circuit and a gas circuit power piece do not need to be additionally arranged to reset the valve core 200, and therefore the opening and closing of the fluid stop valve are controlled at low cost. In addition, because the first guide surface 102 and the second guide surface 211 are both in a contracted shape, when the position of the valve element 200 changes so that the valve element is changed between the working state and the cut-off state, liquid is not easily accumulated on the first guide surface 102 and the second guide surface 211, and more accurate liquid injection can be realized.

In some embodiments, the fluid shut-off valve further comprises a first seal 600, the second flow directing surface 211 or the first flow directing surface 102 providing the first receiving groove 212. The first sealing member 600 is disposed in the first receiving groove 212. The first sealing element 600 may seal the first flow guiding surface 102 and the second flow guiding surface 211, so that when the first flow guiding surface 102 and the second flow guiding surface 211 are abutted against each other, no liquid enters the valve element 200 through a gap therebetween, thereby preventing the liquid from leaking into the valve element 200 when the valve element 200 is in a stop state.

In some embodiments, the second guiding surface 211 is disposed on the first receiving groove 212. This arrangement prevents a large amount of liquid from entering the first accommodation groove 212 when the valve cartridge 200 is in the operating state.

In some embodiments, the first seal 600 may be selected to be a gasket.

In some embodiments, as shown in fig. 1-3, the central axes of the inlet passage 110 and the poppet passage 120 of the valve body 100 coincide with the axis of the valve body 100. The valve body 100 may have a cylinder-like shape. The valve body 100 forms two openings along the first direction, wherein one opening is the liquid inlet opening 101, and the liquid can enter the liquid inlet channel 110 from the liquid inlet opening 101. The priming member 400 is located outside of the other opening.

As shown in fig. 1-3, in some embodiments, valve cartridge 200 has a flow passage 203 that communicates between inlet port 201 and outlet port 202. The valve core 200 may be shaped like a cylinder, and the liquid passing channel 203 penetrates through one end of the valve core 200 along the axial direction of the valve core 200, wherein the liquid inlet 201 may be disposed on a circumferential side wall of the valve core 200, specifically, the liquid inlet 201 penetrates through the circumferential side wall of the valve core 200 to communicate with the liquid passing channel 203. The liquid outlet 202 may be disposed on an end surface of the valve core 200, and in some embodiments, the liquid passing channel 203 penetrates through an end surface of one end of the valve core 200 to form the liquid outlet 202 on the end surface.

In some of these embodiments, the number of loading ports 201 is one. The inlet port 201 may be provided in a circumferential side wall of the valve cartridge 200. In other embodiments, the number of the liquid inlets 201 is multiple, the multiple liquid inlets 201 are arranged at intervals along the circumferential direction of the valve core 200, and the multiple liquid inlets 201 are all communicated.

For example, as shown in fig. 1 to 3, the number of the liquid inlets 201 is four, and the four liquid inlets 201 are uniformly spaced along the circumferential direction of the valve core 200. The four liquid inlet ports 201 are communicated with one place, and form part of the liquid passing channel 203. Liquid entering the liquid passing channel 203 from any liquid inlet 201 is converged and then discharged out of the liquid passing channel 203 through the liquid outlet 202. Such setting can improve the feed liquor efficiency, can avoid single inlet 201 to block up moreover and lead to the condition emergence of unable feed liquor.

In some embodiments, the valve cartridge 200 may be directly connected to the injection member 400. In other embodiments, the valve cartridge 200 may be indirectly connected to the injection member 400.

In some embodiments, the fluid shut-off valve further comprises a connector 300. The connecting member 300 connects the valve cartridge 200 and the injection member 400 to achieve an indirect connection between the valve cartridge 200 and the injection member 400. The connector 300 has a flow passage 301. The liquid outlet 202 is communicated with the liquid outlet channel 401 through the flow channel 301. After entering the valve body 100 through the liquid inlet 201, the liquid is discharged to the flow channel 301 through the liquid outlet 202, and flows through the liquid outlet channel 401 to be discharged to complete the liquid injection. The connecting member 300 is provided to facilitate the connection between the valve cartridge 200 and the injection member 400, and such arrangement facilitates the replacement of the injection member 400 and prevents the valve cartridge 200 from being damaged.

In some embodiments, the restoring member 500 has elasticity. The reset piece 500 has elastic deformation when being compressed, and the reset piece 500 is restored to the original state and releases the elastic force when not being subjected to external force. The reset piece 500 is sleeved on the outer wall of the valve core 200. In the first direction, one end of the reset piece 500 abuts against the connection piece 300, and the other end abuts against the inner wall of the spool passage 120. When the liquid injection member 400 abuts against the to-be-injected member 400, and the valve core 200 moves relative to the valve body 100 along the first direction, the valve core 200 is in a working state, and in the first direction, the distance between the two ends of the reset member 500 is reduced to compress the reset member 500 and enable the reset member 500 to accumulate restoring force. When the liquid injection piece 400 is separated from the liquid injection piece 400 to be injected, the reset piece 500 restores to the original length, so that the distance between the two ends of the reset piece 500 is increased, that is, the reset piece 500 drives the valve core 200 to move along the first direction relative to the valve body 100.

In some embodiments, the reset 500 may be a spring. In other embodiments, the restoring member 500 may also be other restoring members with elasticity, such as an elastic rubber sleeve.

It can be understood that in the embodiment where the valve core 200 is directly connected to the filling member 400, the restoring member 500 may be sleeved on an outer wall of a portion of the valve core 200, and in the first direction, one end of the restoring member 500 abuts against the outer wall of the valve core 200, and the other end abuts against an inner wall of the valve core channel 120. The reset of the valve spool 200 is achieved by the restoring force of the reset member 500.

In some embodiments, a reset seal 800 is also included. The reset seal 800 may be disposed on the outer wall of the connector 300. The reset sealing member 800 is disposed at an end of the reset member 500 away from the liquid inlet 201. The reset seal 800 may seal the gap between the connector 300 and the inner wall of the passageway of the valve body 100 to prevent leakage from the gap. It is understood that in the embodiment without the connection member 300, the reset seal 800 may be disposed on the outer wall of the valve core 200, and the reset seal 800 is disposed on the outer wall of the valve core 200 at a side of the reset 500 away from the liquid inlet 201. The reset seal 800 may seal a gap between the valve cartridge 200 and the inner wall of the channel of the valve body 100 to prevent leakage at the gap.

In some embodiments, the outer wall of the connection member 300 or the outer wall of the valve core 200 defines a reset seal groove 321 for receiving the reset seal 800. The return seal groove 321 may be disposed in an annular shape on an outer wall of the connection member 300 or an outer wall of the valve spool 200. The reset seal 800 may snap fit into the reset seal groove 321.

In some embodiments, the number of the reset seals 800 may be one or more. When the number of the reset seals 800 is plural, the plural reset seals 800 may be sequentially arranged in parallel at intervals in the axial direction of the connector 300 or the valve cartridge 200.

In some embodiments, the reset seal 800 may be a gasket.

In some embodiments, the flow channel 301 of the connecting member 300 may include a first flow channel 3011 and a second flow channel 3012 which are sequentially communicated. The first flow channel 3011 communicates with the liquid outlet 202 and is constricted in a direction away from the liquid outlet 202, that is, the cross-sectional area of the first flow channel 3011 gradually decreases along a direction from the first flow channel 3011 to the second flow channel 3012. The second flow passage 3012 communicates with the liquid outlet passage 401. The cross-sectional area of the second flow channel 3012 is smaller than the cross-sectional area of the liquid passing channel 203. By providing the first flow channel 3011 in a constricted shape, when liquid enters the flow channel 301 from the liquid passage 203 having a large cross-sectional area, the impact of the liquid on the inner wall of the flow channel 301 is small, and the impact force can be dispersed. In some embodiments, outlet port 202 is flared in a first direction, i.e., the cross-sectional area of outlet port 202 increases gradually in a direction from inlet port 201 to outlet port 202. The arrangement can reduce the flow velocity of the liquid slightly when the liquid enters the flow channel 301 from the valve core 200, and reduce the impact force of the liquid on the inner wall of the flow channel 301.

In some embodiments, first flow channel 3011 is convergent in the first direction and exit port 202 is divergent in the first direction. Such an arrangement can reduce the speed of the fluid and disperse the impact force when the fluid enters the flow channel 301 from the liquid passing channel 203 with a large cross-sectional area, thereby reducing the influence of the fluid on the connection stability of the valve body 100 and the connecting member 300.

In some embodiments, the spool passage 120 may include a first passage 121, a second passage 122, and a third passage 123 that communicate in sequence in a first direction. Wherein the first channel 121 may accommodate a portion of the valve cartridge 200 having the inlet port 201. The second passage 122 may receive the portion of the valve cartridge 200 in which the reset element 500 is seated, that is, the reset element 500 is received in the second passage 122. The third passage 123 may receive a portion of the valve cartridge 200 where the connection member 300 is provided, that is, at least a portion of the connection member 300 is received in the third passage 123. The inner wall of the second passage 122 has a connection face 103. The connecting surface 103 may abut against the reset piece 500, that is, in the first direction, one end of the reset piece 500 abuts against the connecting surface 103, so as to abut against the valve body 100, and the other end of the reset piece 500 abuts against the connecting piece 300. It is understood that in other embodiments, the connection surface 103 may be a transition surface of the first channel 121 and the second channel 122.

The cross-sectional areas of the first channel 121, the second channel 122 and the third channel 123 are sequentially increased. The cross-sectional area of the second channel 122 is greater than the cross-sectional area of the first channel 121, so that the valve element 200 is sleeved with the reset element 500, and the strength of the valve element 200 can be ensured without reducing the thickness of the corresponding portion of the valve element 200 so that the valve element 200 can be accommodated in the valve element channel 120. The cross sectional area of the third channel 123 is greater than the cross sectional area of the second channel 122, so that the connecting piece 300 can be increased in abutting area with the reset piece 500, and further, when the reset piece 500 is prevented from being deformed, the reset piece 500 is separated from the connecting piece 300. In addition, the cross-sectional area of the third passageway 123 being greater than the cross-sectional area of the second passageway 122 may also facilitate installation of the reset seal 800.

In some embodiments, the inner wall of the spool passage 120 defines the first abutting surface 104, and the connecting member 300 defines the second abutting surface 322, such that the restoring member 500 has a maximum restoring force when the second abutting surface 322 abuts against the first abutting surface 104. It can be understood that when the second contact surface 322 contacts the first contact surface 104, the valve element 200 moves to the limit position and cannot move relative to the valve body 100 in the original movement direction. At this time, the restoring member 500 is compressed to a state where the compression amount is maximum. By providing the first abutting surface 104 and the second abutting surface 322, the reset member 500 can be prevented from being compressed too much due to excessive movement of the valve element 200.

In some embodiments, the first abutting surface 104 is a transition surface of the second channel 122 and the third channel 123.

In some embodiments, the inner wall of the inlet passage 110 is provided with a first limiting surface 105. The end of the spool 200 is provided with a second stopper surface 213. When the valve element 200 is in the working state, the first limiting surface 105 abuts against the second limiting surface 213. It can be understood that when the first position-limiting surface 105 abuts against the second position-limiting surface 213, the valve element 200 moves to the extreme position and cannot move relative to the valve body 100 along the original movement direction, so as to avoid the leakage of the valve element 200 caused by the excessive movement of the valve element 200.

In some embodiments, the fluid stop valve further includes a second seal 700, the spool 200 or the spool passage 120 is disposed in the second receiving groove 221, the second seal 700 is disposed in the second receiving groove 221, and the second seal 700 may seal the inner walls of the spool 200 and the spool passage 120 to prevent liquid from entering into a gap between the spool 200 and the spool passage 120, thereby further preventing liquid leakage.

It will be appreciated that in some embodiments, the second seal 700 may seal the inner channel wall of the first channel 121 to the valve cartridge 200. The provision of the second seal 700 at the first passage 121 may better prevent liquid from flowing out of the fluid shut-off valve from the outer wall of the valve cartridge 200 than if the second seal 700 were provided at the second passage 122 or the third passage 123.

In some embodiments, the second seal 700 may be a gasket.

In some embodiments, in the first direction, the valve cartridge 200 includes an inlet section 210, an intermediate section 220, and a connecting section 230 connected in series. Wherein, the liquid passing channel 203 penetrates the middle section 220 and the connecting section 230.

The entry section 210 may be provided with the aforementioned second flow guiding surface 211. The end surface of the inlet section 210 is provided with the aforementioned second limiting surface 213. The end of the middle section 220 connected with the inlet section 210 is provided with the liquid inlet 201. The intermediate section 220 may be provided with a second receiving groove 221. The portion of the middle section 220 adjacent to the connecting section 230 can be sleeved with the reset piece 500. The end surface of the connecting section 230 remote from the middle section 220 may be provided with a liquid outlet 202. In addition, the end of the connecting section 230 may extend into the connector 300 to facilitate connection with the connector 300.

When the valve core 200 is in the working state, the inlet section 210 and the part of the middle section 220 with the liquid inlet 201 are positioned in the liquid inlet channel 110, and the rest part is positioned in the valve core channel 120. When the valve cartridge 200 is in the off state, only the inlet section 210 of the valve cartridge 200 is located in the inlet passage 110.

The fluid stop valve is simple in structure, and a circuit or a gas circuit power part is not needed in the opening and closing process. The sealing performance is good, and the sealing performance can be controlled by changing the elastic force of the resetting piece 500. The first guide surface 102 and the second guide surface 211 which are in a contraction shape are arranged, so that liquid is not easy to accumulate.

A liquid injection device comprises any fluid stop valve. The liquid injection equipment can inject liquid into the battery, and the injected liquid can be electrolyte. The liquid injection device can further comprise a pump body and a liquid delivery pipe, and the pump body can enable liquid in the liquid delivery pipe to generate power so that the liquid can be conveniently input into the fluid stop valve.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A fluid shut-off valve, comprising:

the valve body is provided with a liquid inlet channel and a valve core channel which are arranged along a first direction and communicated with each other, and a first flow guide surface which is in a contraction shape along the first direction is arranged on the inner wall of the liquid inlet channel;

the valve core, some said valve cores locate in said liquid inlet channel, the remaining said valve core is through-set in said valve core channel, said valve core and said valve core channel are sealed and set up, said valve core can move along the first direction and second direction relative to said valve block, the said second direction is the opposite direction of the said first direction; the valve core is provided with a liquid inlet and a liquid outlet; the outer wall of the valve core is provided with a second flow guide surface which is in a contraction shape along the first direction;

the liquid injection piece is connected with the valve core and is provided with a liquid outlet channel which is communicated with the liquid outlet; and

the reset piece is arranged in the valve core channel and is used for driving the valve core to reset from a working state to a cut-off state;

when the valve core is in a working state, the second flow guide surface is separated from the first flow guide surface, and the liquid inlet is positioned in the liquid inlet channel;

when the valve core is in a cut-off state, the second flow guide surface is abutted against the first flow guide surface, and the liquid inlet is positioned in the valve core channel.

2. The fluid stop valve of claim 1, further comprising a connector having a flow channel, wherein the connector connects the valve core and the filling member, and the liquid outlet is connected to the liquid outlet channel through the flow channel.

3. The fluid shutoff valve of claim 2, wherein the reset member is disposed on the outer wall of the valve core, the reset member has elasticity, and in the first direction, one end of the reset member abuts against the connecting member, and the other end abuts against the inner wall of the valve core passage.

4. The fluid shutoff valve of claim 3 wherein the spool passage includes a first passage, a second passage and a third passage in communication with one another in a first direction, the first passage for receiving the portion of the spool having the fluid inlet, the second passage for receiving the portion of the spool fitted with the reset member, the third passage for receiving the portion of the spool provided with the connector; the inner wall of the second channel is provided with a connecting surface which is used for being abutted against the resetting piece; the cross-sectional areas of the first channel, the second channel and the third channel are sequentially increased.

5. The fluid shut-off valve of claim 3, wherein the inner wall of the spool passage defines a first abutment surface and the connecting member defines a second abutment surface, the reset member having a maximum restoring force when the second abutment surface abuts the first abutment surface.

6. The fluid stop valve of claim 2, wherein the flow channel comprises a first flow channel and a second flow channel which are sequentially communicated, the first flow channel is communicated with the liquid outlet and is contracted in a direction away from the liquid outlet, the second flow channel is communicated with the liquid outlet channel, the valve core is provided with a liquid passing channel communicated with the liquid inlet and the liquid outlet, and the cross-sectional area of the second flow channel is smaller than that of the liquid passing channel.

7. The fluid shut-off valve of claim 1, wherein the fluid outlet is flared in a first direction;

and/or, the quantity of inlet is a plurality of, and is a plurality of the inlet is followed the circumference interval setting of case, say one the inlet all communicates.

8. The fluid stop valve of claim 1, wherein the inner wall of the inlet channel is provided with a first limiting surface, the end of the valve core is provided with a second limiting surface, and when the valve core is in a working state, the first limiting surface is abutted against the second limiting surface.

9. The fluid shut-off valve according to any one of claims 1-8, wherein: the fluid stop valve further comprises a first sealing element, the second diversion surface or the first diversion surface is provided with a first accommodating groove, the first sealing element is arranged in the first accommodating groove, and the first sealing element is used for sealing the first diversion surface and the second diversion surface;

and/or the fluid stop valve further comprises a second sealing element, a second accommodating groove is formed in the inner wall of the valve core or the valve core channel, the second sealing element is arranged in the second accommodating groove, and the second sealing element is used for sealing the valve core and the inner wall of the valve core channel.

10. A priming device comprising a fluid shut-off valve according to any one of claims 1 to 9.

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